1. 毕业设计（论文）的内容和要求

作为一种纳米多孔材料，气凝胶具有连续3维纳米多孔网络结构，赋予其低密度、高比表面积、大孔隙率等特性，其独特的网络结构可以有效限制热量传输，是一种理想的高性能隔热保温材料，其室温热导率可低至0.018w/(m#8729;k)以下，大大优于传统隔热材料，可用于蒸汽管道保温、窑炉保温、建筑节能、高速飞行器和特种服装等。

气凝胶种类众多，目前研究最多最成熟的是sio2气凝胶，但传统的sio2气凝胶强度低、脆性大、疏水性能差，极大地限制了其应用。

本论文旨在制备出一种柔性气凝胶隔热保温材料，以满足特低温保温领域的应用需求，如用作特种服装用保暖材料。

2. 参考文献

[1] Cardea S, Gugliuzza A, Sessa M, et al. Supercritical Gel Drying: A Powerful Tool for Tailoring Symmetric Porous PVDF-HFP Membranes [J]. Acs Applied Materials Interfaces, 2009, 1(1): 171-180. [2] Si Y, Fu Q X, Wang X Q, et al. Superelastic and Superhydrophobic Nanofiber-Assembled Cellular Aerogels for Effective Separation of Oil/Water Emulsions [J]. Acs Nano, 2015, 9(4): 3791-3799. [3] Yang C Y, Sun M Q, Wang X, et al. A Novel Flexible Supercapacitor Based on Cross-Linked PVDF-HFP Porous Organogel Electrolyte and Carbon Nanotube Paper@pi-Conjugated Polymer Film Electrodes [J]. ACS Sustainable Chemistry Engineering, 2015, 3(9): 2067-2076. [4] Yu Y L, Chen H, Liu Y, et al. Superhydrophobic and Superoleophilic Porous Boron Nitride Nanosheet/Polyvinylidene Fluoride Composite Material for Oil-Polluted Water Cleanup [J]. Advanced Materials Interfaces, 2015, 2(1): [5] Chen X L, Liang Y N, Tang X Z, et al. Additive-free poly (vinylidene fluoride) aerogel for oil/water separation and rapid oil absorption [J]. Chemical Engineering Journal, 2017, 308:18-26. [6] Li R, Chen C B, Li J, et al. A facile approach to superhydrophobic and superoleophilic graphene/polymer aerogels [J]. Journal of Materials Chemistry A, 2014, 2(9): 3057-3064. [7] Cardea S, Sessa M, Reverchon E. Supercritical CO2 assisted formation of poly(vinylidenefluoride) aerogels containing amoxicillin, used as controlled release device [J]. Journal of Supercritical Fluids, 2011, 59:149-156. [8] Cardea S, Sessa M, Reverchon E. Supercritical Co2 Processing of Drug Loaded Membranes Based on Nanoporous PVDF-HFP Aerogels [J]. Soft Materials, 2011, 9(2-3): 264-279. [9] Guenet J M, Parmentier J, Daniel C. Porous Materials from Polyvinylidene Fluoride/Solvent Molecular Compounds [J]. Soft Materials, 2011, 9(2-3): 280-294. [10] 孔勇，沈晓冬，崔升. 气凝胶纳米材料 [J]. 中国材料进展, 2016, 35(8): 1-8. [11] Reverchon E, Cardea S. PVDF-HFP membrane formation by supercritical CO2 processing: Elucidation of formation mechanisms [J]. Industrial Engineering Chemistry Research, 2006, 45(26): 8939-8945. [12] 祖国庆, 沈军, 倪星元, 等. 常压干燥制备高弹性气凝胶[J]. 功能材料, 2011, 42(1): 151-154. [13] 杨海龙, 孔祥明, 曹恩祥, 等. 聚合物改性SiO2 气凝胶的常压干燥制备及表征[J]. 复合材料学报, 2012 (2): 1-9. [14] 杨杰, 李树奎, 王富耻. 气凝胶复合材料抗弹性能的研究[J]. 北京理工大学学报, 2011, 31(7): 867-871. [15] M. Schwan, L. Ratke. Flexibilisation of resorcinol-formaldehyde aerogels [J]. Journal of Materials Chemistry A, 2013, 1(43): 13462-13468. [16] K. Kanamori, M. Aizawa, K. Nakanishi, et al. New transparent methylsilsesquioxane aerogels and xerogels with improved mechanical properties [J]. Advanced Materials, 2007, 19(12): 1589-1593. [17] K. Kanamori, M. Aizawa, K. Nakanishi, et al. Elastic organic#8211;inorganic hybrid aerogels and xerogels[J]. Journal of Sol-Gel Science and Technology, 2008, 48(1-2): 172-181. [18] M. Schwan, B.Milow, L. Ratke. Novel superflexible resorcinol#8211;formaldehyde aerogels and combining of them with aramid honeycombs[J]. MRS Communications, 2014, 4(04): 177-181. [19] S.D. Bhaga, C.S. Oh, Y.H. Kim, et al. Methyltrimethoxysilane based monolithic silica aerogels via ambient pressure drying[J]. Microporous and Mesoporous Materials, 2007, 100(1): 350-355.

3. 毕业设计（论文）进程安排

2017.12.11～2017.12.26 确定选题、下达任务书 2016.12.26～2017.1.13 完善课题研究方案、外文翻译、文献综述和开题报告等工作 2017.2.26～2017.6.14 开展实验研究、结果分析 完成中期检查工作 撰写、修改、完善毕业论文 答辩